Grandstream HT841 FXO Gateway – 4 FXO Ports, 1 FXS Port

Connect 4 Traditional PSTN Lines to an IP PBX — Grandstream HT841

The Grandstream HT841 lets you integrate four PSTN landlines with a VoIP system or IP PBX, with an additional FXS port for an analog phone and a Lifeline feature that keeps you connected over the traditional line during a power outage.

Why Choose the HT841?

The HT841 is a practical choice for businesses and branches that want to use their existing landlines within a SIP environment, with centralized management, T.38 fax support and a failover SIP server.

What Does It Offer?

• 4 FXO ports: to connect four PSTN lines.


• 1 FXS port: to connect an analog phone or fax machine.


• 3 SIP profiles: across the FXS and FXO ports.


• Lifeline: connects the FXS port to an FXO line during a power outage.


• 2 Ethernet ports: with PoE-PD support on the dedicated network port, per Grandstream specifications.


• Built-in NAT router.


• 3-way voice conferencing per port.


• Fax over IP: T.38 supported.


• Failover SIP Server: switches to a backup server if the primary server fails.


• AES, SRTP and TLS security: with a unique security certificate per unit.


• Secure provisioning: via TR-069 and configuration files.


• GDMS management: for centralized configuration and monitoring.

Key Technical Specifications

• Model: HT841


• Type: Analog FXO Gateway


• FXO: 4


• FXS: 1


• SIP profiles: 3


• Voice conferencing: 3 parties per port


• Fax over IP: T.38


• Lifeline: Supported


• PoE-PD: Supported on the dedicated network port


• Operating temperature: 0°C to 40°C

Best Suited For

Businesses, branches and offices that want to connect up to 4 traditional landlines to an IP PBX or SIP system while keeping a backup analog line.

Easily integrate your existing PSTN lines with your VoIP system — order the Grandstream HT841 from Catcher.